I'm really sorry to hear you had a bad experience of the cleaning. Normally I always make sure the apartment is clean between two guests but this time I was out of town so I asked the previous guests to make sure they would leave the apartment in a good condition. Obviously they did not.
Also, I just realised that you're right about the couch, something is not working as supposed when folding out to a double bed. It still works just as fine as a couch or a single bed though.
Je fais toujours une visite dans l'appartement entre deux locations, quand je suis dans la ville. Mais comme je fais aussi assez bcp de voyages, de temps en temps je ne peux pas contrôler la condition de l'appartement. Dans ces cas, je fais toujours extra attention à rappeler les locataires précédents concernant le nettoyage.